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Finding the Fourth Proportional to 640,622.25, 961,512.93 and 341,355.60

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Solution

The fourth proportional to 640,622.25, 961,512.93 and 341,355.60 is: 512,342.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,622.25 : 961,512.93 = 341,355.60 : x
  2. Step 2: Convert to fraction form
    640,622.25/961,512.93 = 341,355.60/x
  3. Step 3: Cross multiply
    640,622.25x = 961,512.93 × 341,355.60
  4. Step 4: Simplify right side
    640,622.25x = 328,217,823,127.91
  5. Step 5: Solve for x
    x = 328,217,823,127.91/640,622.25
  6. Step 6: Final answer
    x = 512,342.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.